/*****************************************************************************
 * Copyright (c) 2022, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************/

/**
 * @file hw_config.c
 * @author Nations
 * @version V1.2.2
 *
 * @copyright Copyright (c) 2022, Nations Technologies Inc. All rights reserved.
 */
/* Includes ------------------------------------------------------------------*/

#include "usb_lib.h"
#include "usb_prop.h"
#include "usb_desc.h"
#include "hw_config.h"
#include "usb_pwr.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ErrorStatus HSEStartUpStatus;
USART_InitType USART_InitStructure;

uint8_t  USART_Rx_Buffer[USART_RX_DATA_SIZE]; 
uint32_t USART_Rx_ptr_in = 0;
uint32_t USART_Rx_ptr_out = 0;
uint32_t USART_Rx_length  = 0;
uint8_t  USB_Tx_State = 0;

/* Extern variables ----------------------------------------------------------*/
//extern LINE_CODING linecoding;

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/**
 * @brief  Configures Main system clocks & power.
 */
void Set_System(void)
{
    EXTI_InitType EXTI_InitStructure;

    /* Configure the EXTI line 18 connected internally to the USB IP */
    // EXTI_ClrITPendBit(EXTI_LINE18);
    // EXTI_InitStructure.EXTI_Line = EXTI_LINE18; 
    // EXTI_InitStructure.EXTI_Mode    = EXTI_Mode_Interrupt;
    // EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    // EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    // EXTI_InitPeripheral(&EXTI_InitStructure);
    // RCC_DeInit();

    // /*Enable HSE*/
    // RCC->CTRL |= RCC_CTRL_HSEEN;
    // while((RCC->CTRL & RCC_CTRL_HSERDF) != RCC_CTRL_HSERDF);

    // /*Set PLL MUL*/
    // RCC_ConfigPll(RCC_PLL_SRC_HSE_DIV1, RCC_PLL_MUL_12, RCC_PLLDIVCLK_DISABLE);
    // /*Enable PLL*/
    // RCC->CTRL |= RCC_CTRL_PLLEN;
    // while((RCC->CTRL & RCC_CTRL_PLLRDF) != RCC_CTRL_PLLRDF); 

    // /*Set AHB/APB1/APB2*/
    // RCC->CFG |= RCC_CFG_AHBPRES_DIV1;
    // RCC->CFG |= RCC_CFG_APB1PRES_DIV4;
    // RCC->CFG |= RCC_CFG_APB2PRES_DIV2;

    // FLASH->AC &= (uint32_t)((uint32_t)~FLASH_AC_LATENCY);
    // FLASH->AC |= (uint32_t)(FLASH_AC_LATENCY_3);

    // /* Select PLL as system clock source */
    // RCC->CFG &= (uint32_t)((uint32_t) ~(RCC_CFG_SCLKSW));
    // RCC->CFG |= (uint32_t)RCC_CFG_SCLKSW_PLL;
    // while ((RCC->CFG & RCC_CFG_SCLKSTS) != RCC_CFG_SCLKSTS_PLL) 
    // {
    // }
}

/**
 * @brief  Configures USB Clock input (48MHz).
 * @param  sysclk: system clock.
 * @return USBClock set Status.
 */
ErrorStatus Set_USBClock(uint32_t sysclk)
{
    ErrorStatus status = SUCCESS;

    switch(sysclk)
    {
    case SYSCLK_VALUE_48MHz: 
        RCC_ConfigUsbClk(RCC_USBCLK_SRC_PLLCLK_DIV1);
        break;
        
    case SYSCLK_VALUE_72MHz: 
        RCC_ConfigUsbClk(RCC_USBCLK_SRC_PLLCLK_DIV1_5);
        break;
        
    case SYSCLK_VALUE_96MHz: 
        RCC_ConfigUsbClk(RCC_USBCLK_SRC_PLLCLK_DIV2);
        break;
    
    case SYSCLK_VALUE_144MHz: 
        RCC_ConfigUsbClk(RCC_USBCLK_SRC_PLLCLK_DIV3);
        break;
    
    default:
        status = ERROR;
        break;
    }

    return status;
}

/**
 * @brief  Power-off system clocks and power while entering suspend mode.
 */
void Enter_LowPowerMode(void)
{
    /* Set the device state to suspend */
    bDeviceState = SUSPENDED;
}

/**
 * @brief  Restores system clocks and power while exiting suspend mode.
 */
void Leave_LowPowerMode(void)
{
    USB_DeviceMess *pInfo = &Device_Info;

    /* Set the device state to the correct state */
    if (pInfo->CurrentConfiguration != 0)
    {
        /* Device configured */
        bDeviceState = CONFIGURED;
    }
    else
    {
        bDeviceState = ATTACHED;
    }
}

/**
  * @brief  Configures USART COM port.
  * @param  USART_InitStruct: pointer to a USART_InitType structure that
  *         contains the configuration information for the specified USART peripheral.
  */
//void USART_COM_Init(USART_InitType* USART_InitStruct)
//{
//    GPIO_InitType GPIO_InitStructure;
//    NVIC_InitType NVIC_InitStructure;
//
//    /* Enable GPIO clock */
//    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_AFIO, ENABLE);
//    /* Enable USART1 Clock */
//    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_USART1, ENABLE);
//
//    /* Initialize GPIO_InitStructure */
//    GPIO_InitStruct(&GPIO_InitStructure);
//
//    /* Configure USART1 Tx as alternate function push-pull */
//    GPIO_InitStructure.Pin = GPIO_PIN_9;
//    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
//    GPIO_InitStructure.GPIO_Alternate = GPIO_AF4_USART1;
//    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
//
//
//    /* Configure USART1 Rx as input floating */
//    GPIO_InitStructure.Pin = GPIO_PIN_10;
//    GPIO_InitStructure.GPIO_Pull      = GPIO_Pull_Up;
//    GPIO_InitStructure.GPIO_Alternate = GPIO_AF4_USART1;
//    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
//
//    /* Enable the USARTy Interrupt */
//    NVIC_InitStructure.NVIC_IRQChannel            = USART1_IRQn;
//    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
//    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
//    NVIC_InitStructure.NVIC_IRQChannelCmd         = ENABLE;
//    NVIC_Init(&NVIC_InitStructure);
//        
//    /* USART1 configuration */
//    USART_Init(USART1, USART_InitStruct);
//  
//    /* Enable the USART1 Receive interrupt */
//    USART_ConfigInt(USART1, USART_INT_RXDNE, ENABLE);
//
//    /* Enable USART1 */
//    USART_Enable(USART1, ENABLE);
//}

/**
 * @brief Configures the USB interrupts.
 */
void USB_Interrupts_Config(void)
{
    NVIC_InitType NVIC_InitStructure;
    EXTI_InitType EXTI_InitStructure;

    /* 2 bit for pre-emption priority, 2 bits for subpriority */
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

    /* Enable the USB interrupt */
    NVIC_InitStructure.NVIC_IRQChannel                   = USB_LP_CAN1_RX0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* Enable the USB Wake-up interrupt */
    NVIC_InitStructure.NVIC_IRQChannel                   = USBWakeUp_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    
    /* Configure the EXTI line 17 connected internally to the USB IP */
    EXTI_ClrITPendBit(EXTI_LINE17);
    EXTI_InitStructure.EXTI_Line = EXTI_LINE17; 
    EXTI_InitStructure.EXTI_Mode    = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_InitPeripheral(&EXTI_InitStructure);
}

/**
 * @brief configure the UASRT with default values.
 */
//void USART_Config_Default(void)
//{
//    /* USART1 default configuration */
//    /* USART1 configured as follow:
//        - BaudRate = 115200 baud  
//        - Word Length = 8 Bits
//        - One Stop Bit
//        - Parity Odd
//        - Hardware flow control disabled
//        - Receive and transmit enabled
//    */
//    USART_InitStructure.BaudRate = 115200;
//    USART_InitStructure.WordLength          = USART_WL_8B;
//    USART_InitStructure.StopBits            = USART_STPB_1;
//    USART_InitStructure.Parity              = USART_PE_NO;
//    USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE;
//    USART_InitStructure.Mode                = USART_MODE_RX | USART_MODE_TX;
//
//    /* Configure and enable the USART1 */
//    USART_COM_Init(&USART_InitStructure);
//}

/**
 * @brief  Configure the USART according to the line coding structure.
 * @return TRUE or FALSE.
 */
//bool USART_Config(void)
//{
//    /* set the Stop bit*/
//    switch (linecoding.format)
//    {
//        case 0:
//            USART_InitStructure.StopBits = USART_STPB_1;
//            break;
//        case 1:
//            USART_InitStructure.StopBits = USART_STPB_1_5;
//            break;
//        case 2:
//            USART_InitStructure.StopBits = USART_STPB_2;
//            break;
//        default :
//            {
//                USART_Config_Default();
//                return (false);
//            }
//    }
//
//    /* set the parity bit*/
//    switch (linecoding.paritytype)
//    {
//        case 0:
//            USART_InitStructure.Parity = USART_PE_NO;
//            break;
//        case 1:
//            USART_InitStructure.Parity = USART_PE_EVEN;
//            break;
//        case 2:
//            USART_InitStructure.Parity = USART_PE_ODD;
//            break;
//        default :
//            {
//                USART_Config_Default();
//                return (false);
//            }
//    }
//
//    /*set the data type : only 8bits and 9bits is supported */
//    switch (linecoding.datatype)
//    {
//        case 0x07:
//            /* With this configuration a parity (Even or Odd) should be set */
//            USART_InitStructure.WordLength = USART_WL_8B;
//            break;
//        case 0x08:
//            if (USART_InitStructure.Parity == USART_PE_NO)
//            {
//                USART_InitStructure.WordLength = USART_WL_8B;
//            }
//        	else 
//            {
//                USART_InitStructure.WordLength = USART_WL_9B;
//            }
//        break;
//        default :
//        {
//            USART_Config_Default();
//            return (false);
//        }
//    }
//
//    USART_InitStructure.BaudRate = linecoding.bitrate;
//    USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE;
//    USART_InitStructure.Mode = USART_MODE_RX | USART_MODE_TX;
//
//    /* Configure and enable the USART */
//    USART_COM_Init(&USART_InitStructure);
//
//    return (true);
//}

/**
 * @brief  send the received data from USB to the UART.
 * @param  data_buffer: data buffer pointer.
 * @param  Nb_bytes: data length.
 */
//void USB_To_USART_Send_Data(uint8_t* data_buffer, uint8_t Nb_bytes)
//{
//    uint32_t i;
//
//    for (i = 0; i < Nb_bytes; i++)
//    {
//        USART_SendData(USART1, *(data_buffer + i));
//        while(USART_GetFlagStatus(USART1, USART_FLAG_TXDE) == RESET); 
//    }  
//}

/**
 * @brief  send data to USB.
 */
//void Handle_USBAsynchXfer (void)
//{
//    uint16_t USB_Tx_ptr;
//    uint16_t USB_Tx_length;
//
//    if(USB_Tx_State != 1)
//    {
//        if (USART_Rx_ptr_out == USART_RX_DATA_SIZE)
//        {
//            USART_Rx_ptr_out = 0;
//        }
//
//        if(USART_Rx_ptr_out == USART_Rx_ptr_in) 
//        {
//            USB_Tx_State = 0; 
//            return;
//        }
//
//        if(USART_Rx_ptr_out > USART_Rx_ptr_in) /* rollback */
//        { 
//            USART_Rx_length = USART_RX_DATA_SIZE - USART_Rx_ptr_out;
//        }
//        else 
//        {
//            USART_Rx_length = USART_Rx_ptr_in - USART_Rx_ptr_out;
//        }
//
//        if (USART_Rx_length > VIRTUAL_COM_PORT_DATA_SIZE)
//        {
//            USB_Tx_ptr = USART_Rx_ptr_out;
//            USB_Tx_length = VIRTUAL_COM_PORT_DATA_SIZE;
//
//            USART_Rx_ptr_out += VIRTUAL_COM_PORT_DATA_SIZE;
//            USART_Rx_length -= VIRTUAL_COM_PORT_DATA_SIZE;
//        }
//        else
//        {
//            USB_Tx_ptr = USART_Rx_ptr_out;
//            USB_Tx_length = USART_Rx_length;
//
//            USART_Rx_ptr_out += USART_Rx_length;
//            USART_Rx_length = 0;
//        }
//        USB_Tx_State = 1; 
//        USB_CopyUserToPMABuf(&USART_Rx_Buffer[USB_Tx_ptr], ENDP1_TXADDR, USB_Tx_length);
//        USB_SetEpTxCnt(ENDP1, USB_Tx_length);
//        USB_SetEpTxValid(ENDP1);
//    }
//  
//}

/**
 * @brief  send the received data from UART 0 to USB.
 */
//void USART_To_USB_Send_Data(void)
//{
//    if (linecoding.datatype == 7)
//    {
//        USART_Rx_Buffer[USART_Rx_ptr_in] = USART_ReceiveData(USART1) & 0x7F;
//    }
//    else if (linecoding.datatype == 8)
//    {
//        USART_Rx_Buffer[USART_Rx_ptr_in] = USART_ReceiveData(USART1);
//    }
//
//    USART_Rx_ptr_in++;
//
//    /* To avoid buffer overflow */
//    if(USART_Rx_ptr_in == USART_RX_DATA_SIZE)
//    {
//        USART_Rx_ptr_in = 0;
//    }
//}

/**
 * @brief  Configures USB Clock input (48MHz).
 * @param  sysclk: system clock.
 * @return USBClock set Status.
 */
ErrorStatus USB_Config(uint32_t sysclk)
{
    ErrorStatus status = SUCCESS;

    if(Set_USBClock(sysclk) == SUCCESS)
    {
        RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_USB, ENABLE);
        status = SUCCESS;
    }
    else
    {
        status = ERROR;
    }

    return status;
}


